East Multnomah County Groundwater Flow Model

Portland, Oregon

SSP&A developed, calibrated, and applied a regional three-dimensional groundwater flow model for a complex multi-aquifer system in the southern Portland Basin near Portland, Oregon. SSP&A used the model to aid the City of Portland in the operation of emergency public water-supply wells which were threatened with local contamination by volatile organic compounds, and to aid in the development of remedial alternatives for remediation of nearby sites. The model software and documentation were submitted by SSP&A to the City of Portland and other parties to serve as an ongoing tool for addressing groundwater contamination and water supply in the Portland area. SSP&A continues to provide expert technical advice on groundwater issues to the Oregon Department of Environmental Quality.